Automatic gas cut-off.



D. S. MARPLE. AUTOMATIC GAS CUT-OFF. APPLIOATION FILED SEPT. 9, 1910.

Patented Sept. 12, 1911.

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COLUMBIA PLANUGRAPH Cu, WASHINGTON, D. c.

D. S. MARPLB.

AUTOMATIC GAS OUT-OPP.

APPLICATION FILED 81m. 9, 1910.

1,003,282; Patented Sept. 12, 1911.

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COLUMBIA FLANOGRXPM CO., WASHINGTON. l)v c.

DAVID S. MARPLE, OF OSBORNE, KANSAS.

AUTOMATIC GAS CUT-OFF.

Specification of Letters Patent.

Patented Sept. 12, 1911.

Application filed September 9, 1910. Serial No. 581,188.

To all whom it may concern.

Be it known that 1, DAVID S. MARBLE, a citizen of the United States,residing at Osborne, in the county of Osborne and State of Kansas, haveinvented new and useful Improvements in Automatic Gas Cut-Offs, of whichthe following is a specification.

This invention relates to automatic gas cutoffs designed particularlyfor use in connection with burners for illuminating gas, the object ofthe invention being to provide a retaining element operable to hold thevalve of the burner normally in a closed position and to provide meansfor holding the valve open against the tension of the first means, andfurther to provide a controlling mechanism including a wind shield Iwhich is located in such proximity with the tip of the burner thatshould the flame be blown out the retaining mechanism will be operatedso as to automatically move the burner to a cut-off position.

In the drawings, forming a portion of this specification and in whichlike numerals of reference indicate similar parts in the several views:Figure 1 is a detail perspective view of a portion of a gas burnershowing the application of my improved automatic cutoff mechanismtherefor, said mechanism being in set position so as to hold the valveopen. Fig. 2 is a similar view showing the mechanism in a releasedposition. Fig. 3 is a detail section taken on the line 88 of Fig. 1.Fig. 4 is a section taken on the line 14t of Fig. 8. Fig. 5 is a detailperspective view of the actuating member. Fig. 6 is a detail sectiontaken on the line 66 of Fig. 2.

My improved automatic cutoff mechanism for gas burners preferablyincludes a front guide bracket 1 and a rear guide bracket 2 which aresecured to the gas pipe 3 and arranged preferably in alinement with eachother. The valve key 4 of the burner 5 has operatively connected theretoone end of a link 6, the opposite end of the link being suitablyconnected with one end of a helical retractile spring 7. The oppositeend of the spring 7 is secured in any suitable well known manner to thegas pipe 3 and it operates to hold the valve normally in a closedposition. A looking or retaining member 8 has its forward end movablyconnected with the link 6. The member 8 is movable in a guide opening 9in the bracket 2. This guide opening has its lower wall formed toprovide a stop 10 with which the free end of the member 8 can be engagedso as to hold the valve against the tension of the spring 7 as clearlyillustrated in Fig. 2 of the drawmgs.

A11 actuating mechanism 11 is provided for the member 8, and asillustrated, it com prises a rock arm 12 which is operatively mounted inthe brackets 1 and 2 hereinbefore described. The rock arm has its rearend formed to provide an actuating portion 13 which is movable betweenhorizontal stops 14: and 14 on the bracket 2. This actuating portion 18is located directly beneath the free extremity of the member 8 for apurpose to be hereinafter more fully described. The end 15 of theactuating portion 13 supports a weight 16 which tends normally to holdthe said actuating portion against the lowermost stop 14:. The oppositeend of the rock arm 12 is formed to provide a vertical arm or support 17on which a controlling member 18 is mounted. This member 18 ispreferably in form of a disk which is concavo-convex and whose concavityis arranged immediately opposite the burner. The concaved surface of thecontrolling member 18 may be nickel-plated if desired so that the member18 may be used as a reflector. It may be also stated that the member 18is mounted for horizontal adjustment on its support 17, a set screw 19or the equivalent thereof being employed to hold the member 18 in'itsadjusted position on the support.

In operation of my improved cutoff mechanism herein described andillustrated, the valve of the burner is turned on as in the ordinarymanner. At the limit of the open stroke of the valve the member 8 willbe actuated and it will fall by gravity to a position where its freeextremity will be locked against the stop 10 in the lower wall of thepassage 9 so as to hold the burner against the tension of the spring 7It frequently happens that gas burners are eX- tinguished by blowing onthem by those un familiar with the working of the burner and should theburner be so blown with a view of extinguishing the flame thereof it isobvio-us that sufficient wind will be directed to the member 18 so as torock the member 12 to cause the actuating portion 13 thereof to moveupwardly against the locked extremity of the member 8. This movement ofthe actuating portion of the rock arm will move the member 8 to areleased position and under tension of the spring 7 the valve will.

be automatically closed.

I claim:

In an automatic gas cutofi, a valve, a spring operating to hold thevalve closed, a member movably connected With the valve, a member havinga passage therein, one of the Walls of the passage being formed toprovide a stop shoulder engaging the movable member so as to hold thevalve against the tension of the spring, a rock member having anactuating portion disposed beneath the said movable member and adaptedto engage the same when the rock member is moved so as 15 to move thesaid movable member to a position to permit it to pass through saidpassage, and an adjustable draft-controlled member supported by the saidrock member.

In testimony whereof I afiix my signature 20 in presence of twoWitnesses.

DAVID S. MARPLE.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents,

' Washington, D. G.

